When the fifth edition of the American Psychiatric Association’s Diagnostic and Statistical Manual of Mental Disorders hits the stores on May 22nd, it will signal the end of a fraught thirteen-year campaign. Every revision of the D.S.M. causes controversy; that’s what happens when experts argue in public about the nature of human suffering. But never has the process provoked warfare so brutal, with attacks coming from within the profession as well from psychiatry’s usual opponents. Indeed, it’s possible that no book has ever been subject to such scrutiny in the course of being written. It is as if J. K. Rowling had produced her Harry Potter sequels in a glass studio with fans looking on and banging the windows whenever she typed something they didn’t like.